From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D923AC433EF for ; Sun, 20 Mar 2022 06:42:44 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 844BA40906; Sun, 20 Mar 2022 06:42:44 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6BM6OQkRv1HB; Sun, 20 Mar 2022 06:42:43 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp4.osuosl.org (Postfix) with ESMTPS id 83C1B40900; Sun, 20 Mar 2022 06:42:43 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5D1FEC001A; Sun, 20 Mar 2022 06:42:43 +0000 (UTC) Received: from smtp4.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5656AC000B for ; Sun, 20 Mar 2022 06:42:42 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp4.osuosl.org (Postfix) with ESMTP id 391AD40903 for ; Sun, 20 Mar 2022 06:42:42 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp4.osuosl.org ([127.0.0.1]) by localhost (smtp4.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VNGhq8mbgYtg for ; Sun, 20 Mar 2022 06:42:41 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by smtp4.osuosl.org (Postfix) with ESMTPS id 95BB740902 for ; Sun, 20 Mar 2022 06:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647758561; x=1679294561; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=riq+74Hd12qH3YALmkqybAFcLX89Dbvo/9sgqkY6aro=; b=kfvQJ8GlVKse/d/TmJllqVtxigk6+G7Rxqd6MKrtvf1S2aO+0gnvYfVN /YPHtefs4cYQGcJCXjSvLKmLG/tlKtvctp7IL1VFQIruyxGLHVUqywxbw n5ae0KXoAEnbl5TTVZ2NmqO0Al52j6XeLGrHM4qax/JW7PiGsL7wy7ixe FfyGesQ77X7vFQ450lV/GE5f7WQ8Pz7Sw1wmrsnCIswzN3XMeyPoKB6Lx 5vb3YWbmwy+3++/dbs6JAwO3kBxr/7dj2CZtIncoGgj/aqvszS+5bb27A 5zaOnSW0E59zIwkcXTdScGbhr8QApT8Sq57H/ILud8IsngU8/tXqhYpet g==; X-IronPort-AV: E=McAfee;i="6200,9189,10291"; a="237961380" X-IronPort-AV: E=Sophos;i="5.90,195,1643702400"; d="scan'208";a="237961380" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 19 Mar 2022 23:42:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,195,1643702400"; d="scan'208";a="691839870" Received: from allen-box.sh.intel.com ([10.239.159.48]) by fmsmga001.fm.intel.com with ESMTP; 19 Mar 2022 23:42:38 -0700 From: Lu Baolu To: Joerg Roedel , Jason Gunthorpe , Christoph Hellwig , Kevin Tian , Ashok Raj , Will Deacon , Robin Murphy , Jean-Philippe Brucker Subject: [PATCH RFC 01/11] iommu: Add pasid_bits field in struct dev_iommu Date: Sun, 20 Mar 2022 14:40:20 +0800 Message-Id: <20220320064030.2936936-2-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220320064030.2936936-1-baolu.lu@linux.intel.com> References: <20220320064030.2936936-1-baolu.lu@linux.intel.com> MIME-Version: 1.0 Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jacob jun Pan X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Use this field to save the pasid/ssid bits that a device is able to support with its IOMMU hardware. It is a generic attribute of a device and lifting it into the per-device dev_iommu struct makes it possible to allocate a PASID for device without calls into the IOMMU drivers. Any iommu driver which suports PASID related features should set this field before features are enabled on the devices. Signed-off-by: Lu Baolu --- include/linux/iommu.h | 1 + drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 1 + drivers/iommu/intel/iommu.c | 5 ++++- 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 6ef2df258673..36f43af0af53 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -368,6 +368,7 @@ struct dev_iommu { struct iommu_fwspec *fwspec; struct iommu_device *iommu_dev; void *priv; + unsigned int pasid_bits; }; int iommu_device_register(struct iommu_device *iommu, diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 627a3ed5ee8f..8e262210b5ad 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2812,6 +2812,7 @@ static int arm_smmu_dev_enable_feature(struct device *dev, master->iopf_enabled = true; return 0; case IOMMU_DEV_FEAT_SVA: + dev->iommu->pasid_bits = master->ssid_bits; return arm_smmu_master_enable_sva(master); default: return -EINVAL; diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 6f7485c44a4b..c1b91bce1530 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4587,8 +4587,11 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev) if (pasid_supported(iommu)) { int features = pci_pasid_features(pdev); - if (features >= 0) + if (features >= 0) { info->pasid_supported = features | 1; + dev->iommu->pasid_bits = + fls(pci_max_pasids(pdev)) - 1; + } } if (info->ats_supported && ecap_prs(iommu->ecap) && -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu